Added icons to options dialog categories

Some categories do not have icons yet, unfortunately.

src/plugins/git/settingspage.cpp

@@ -122,6 +122,11 @@ QString SettingsPage::displayCategory() const
     return QCoreApplication::translate("VCSBase", VCSBase::Constants::VCS_SETTINGS_TR_CATEGORY);
 }
 
+QIcon SettingsPage::categoryIcon() const
+{
+    return QIcon(); // TODO: Icon for Version Control
+}
+
 QWidget *SettingsPage::createPage(QWidget *parent)
 {
     m_widget = new SettingsPageWidget(parent);

src/plugins/git/settingspage.h

@@ -74,6 +74,7 @@ public:
     QString displayName() const;
     QString category() const;
     QString displayCategory() const;
+    QIcon categoryIcon() const;
 
     QWidget *createPage(QWidget *parent);
     void apply();